refactor(schema): remove temporary handling of mistyped property values

[AlessandroPomponio]

Issue

For historical reasons we have the following code: https://github.com/IBM/ado/blob/main/orchestrator/schema/property_value.py#L137-L146

This serves as a workaround for an old bug where, if the valueType was not set, it defaulted to NUMERIC even if the value was not a number, such as a string or list.

Our tests track this by xfailing on it: https://github.com/IBM/ado/blob/main/tests/schema/test_property_value.py#L137-L161

We should fix the entities (created before 25/04/25) which may exhibit this issue:

1. For every entity where there is a mismatch (in constitutive property values or observed property values), read the entity from the db and store it back, along with all its measurements results.
2. Change check_value_type to raise an error
3. Remove the XFAIL